Platen for type-writers.



PATENTED DEC. 4, 1.906

Cv K. BRADFORD. PLATEN FOR TYPE WRITER.

APPLICATION FILED FEB. 3, 1906.

WITNESSES GHARLE K.

G? ONEFGURTH rrrrnnr cr mes.

BRADFORD, F l.-YNNF1ELD, MASSACHUSETTS, ASSIGNOR TO' {ii-iARLES ViBRADFORD AND ONE-FOURTH TO iliADiOid); BOEBTON, MASSACHUSETTS.

Specification of Letters Patent.

Application filed February 3. 1906- Serial No. 299,341.

- by the impact of the printing characters of a type-writer against thepaper supported by the platen.

The invention consists in a type-writer platen having a face composed ofresilient hard-surfaced wear-resisting sections, prcferably of thintempered sheet metal, such as steel, and a yleldingnoise-muffiingbacking for said sections supported by the body of the platen,- the saidsections being independent ofeach other to such an extent that thevibrations of each section will be absorbed by the yielding backing.

Of the accompanying drawings, forming a art of this s ecifi'cation Fiure 1 re resents a perspective view of a type-writer platen embodying myinvention. Fig. 2 represents a transverse section of the same. resents alongitudinal section.

The same numerals of reference indicate the same parts in all of thefigures.

In carrying out my invention I provide a type-writer platen having arigid body por- Ton, which may be of any suitable construction, the samebeing here shown as composed of a rigid metallic tube 12 and anenlargement 13, the said tube or enlargement being preferably formed bypaper wound in a compact roll upon the tube 12. i do not limit myself,however, to this construction and may construct the rigid body of theplaten in any other suitable way.

' the actin face of the platen, said face being 1 14 represents a noise-mufiiing member, which is formed as a cover for the rigid body and maybe composed of any suitable yielding material, such as soft rubber,felt, or the usual composition of glue, glycerin, and molasses used forprinters rolls. The mem ber 14 constitutes a support or backing forcompose of strips or sections 15 15, of hardsuri'aced resilientmaterial, preferablysheetsteel. The sections 15 are placed in close Fig.3 repproximity to each other, edge to edge, and are secured at their endportions to the platen in any suitable way, preferably by being attachedby rivets 16 or otherwise to rigid outwardly-projecting end flanges 17,ahixed to the rigid body of the platen. The sections 15 are of uniformwidth and are so arranged that the printing characters of thetype-writer will strike each section when it is brought into operativeposition about midway between its edges. I consider it preferable toslightly separate the adjacent edges of the sections, so that they willnot be in actual contact with each other.

A platen constructed as above described does not possess the resonantqualities of the ordinary platen, so that the noise caused by the impactof the printing characters against the paper supported by the platen isvery muchreduced. Hence the objectionable noise attending the operationof type-writers with ordinary platens is obviated.

I do not limit myself to the details of construction above described, asthe construction may be variously modified Without departing from thespirit of my invention.

1. A type-writer platen having a face composed of resilient,hard-surfaced, wear-resisting sections with their edges in closeroximity, and a yielding, noise-mufiling acking for said sections.

2. A type-writer platen comprising a sectional face of resilient,hard-surfaced, wearresisting material, the sections having their edgesin close proximity, a rigid'body ortion, and a yielding, noise-mufilingbac ring interposed between the body and the sectional face.

.3. A type-writer platen comprising a rigid body havingoutwardly-pro'ecting flanges at its end portions, resilient s est-metalstrips attached at their ends to said flanges, said stri s having theiredges in close proximity, an a yielding, noise-mufiiing backinginterposed between the body and the said strips.

In testimony whereof I have affixed my signature in presence of twowitnesses.

CHARLES K. BRADFORD. Witnesses: w C. F. BROWN,

E. BATOHELDER.

